[pulseaudio] Add start/stop, config latency, avoid underruns when pausing and misc

This commit is contained in:
ejurgensen 2016-10-06 23:35:09 +02:00
parent a0dfb5c93e
commit 8b842b18d5
2 changed files with 134 additions and 42 deletions

View File

@ -174,7 +174,7 @@ audio {
# If not set, the value for "card" will be used.
# mixer_device = ""
# Syncronization - ALSA only
# Syncronization
# If your local audio is out of sync with AirPlay, you can adjust this
# value. Positive values correspond to moving local audio ahead,
# negative correspond to delaying it. The unit is samples, where is

View File

@ -39,6 +39,7 @@
#include "commands.h"
#define PULSE_MAX_DEVICES 64
#define PULSE_LOG_MAX 10
/* TODO for Pulseaudio
- Get volume from Pulseaudio on startup and on callbacks
@ -62,6 +63,8 @@ struct pulse_session
pa_buffer_attr attr;
int logcount;
char *devname;
int volume;
@ -225,6 +228,22 @@ pulse_session_shutdown(struct pulse_session *ps)
commands_exec_async(pulse.cmdbase, session_shutdown, ps);
}
/* ------------------------ EXECUTED IN BOTH THREADS ------------------------ */
static void
pulse_session_shutdown_all(pa_stream_state_t state)
{
struct pulse_session *ps;
struct pulse_session *next;
for (ps = sessions; ps; ps = next)
{
next = ps->next;
ps->state = state;
pulse_session_shutdown(ps);
}
}
/* --------------------- CALLBACKS FROM PULSEAUDIO THREAD ------------------- */
@ -257,7 +276,15 @@ underrun_cb(pa_stream *s, void *userdata)
{
struct pulse_session *ps = userdata;
if (ps->logcount > PULSE_LOG_MAX)
return;
ps->logcount++;
if (ps->logcount < PULSE_LOG_MAX)
DPRINTF(E_WARN, L_LAUDIO, "Pulseaudio reports buffer underrun on '%s'\n", ps->devname);
else if (ps->logcount == PULSE_LOG_MAX)
DPRINTF(E_WARN, L_LAUDIO, "Pulseaudio reports buffer underrun on '%s' (no further logging)\n", ps->devname);
}
static void
@ -265,7 +292,15 @@ overrun_cb(pa_stream *s, void *userdata)
{
struct pulse_session *ps = userdata;
if (ps->logcount > PULSE_LOG_MAX)
return;
ps->logcount++;
if (ps->logcount < PULSE_LOG_MAX)
DPRINTF(E_WARN, L_LAUDIO, "Pulseaudio reports buffer overrun on '%s'\n", ps->devname);
else if (ps->logcount == PULSE_LOG_MAX)
DPRINTF(E_WARN, L_LAUDIO, "Pulseaudio reports buffer overrun on '%s' (no further logging)\n", ps->devname);
}
// This will be called our request to open the stream has completed
@ -453,11 +488,11 @@ context_state_cb(pa_context *c, void *userdata)
state = pa_context_get_state(c);
DPRINTF(E_DBG, L_LAUDIO, "Pulseaudio context state changed to %d (ready is %d)\n", state, PA_CONTEXT_READY);
switch (state)
{
case PA_CONTEXT_READY:
DPRINTF(E_DBG, L_LAUDIO, "Pulseaudio context state changed to ready\n");
o = pa_context_get_sink_info_list(c, sinklist_cb, NULL);
if (!o)
{
@ -478,8 +513,15 @@ context_state_cb(pa_context *c, void *userdata)
pa_threaded_mainloop_signal(pulse.mainloop, 0);
break;
case PA_CONTEXT_TERMINATED:
case PA_CONTEXT_FAILED:
case PA_CONTEXT_TERMINATED:
if (state == PA_CONTEXT_FAILED)
DPRINTF(E_LOG, L_LAUDIO, "Pulseaudio failed with error: %s\n", pa_strerror(pa_context_errno(c)));
else
DPRINTF(E_LOG, L_LAUDIO, "Pulseaudio terminated\n");
pulse_session_shutdown_all(PA_STREAM_FAILED);
pa_threaded_mainloop_signal(pulse.mainloop, 0);
break;
@ -496,7 +538,7 @@ context_state_cb(pa_context *c, void *userdata)
// Used by init and deinit to stop main thread
static void
pulse_free(struct pulse *p)
pulse_free(void)
{
if (pulse.mainloop)
pa_threaded_mainloop_stop(pulse.mainloop);
@ -507,42 +549,19 @@ pulse_free(struct pulse *p)
pa_context_unref(pulse.context);
}
if (p->cmdbase)
commands_base_free(p->cmdbase);
if (pulse.cmdbase)
commands_base_free(pulse.cmdbase);
if (pulse.mainloop)
pa_threaded_mainloop_free(pulse.mainloop);
}
// TODO delete this and use context_cb to deal with bad states
static int
context_check(pa_context *context)
{
pa_context_state_t state;
int errno;
state = pa_context_get_state(context);
if (!PA_CONTEXT_IS_GOOD(state))
{
if (state == PA_CONTEXT_FAILED)
{
errno = pa_context_errno(context);
DPRINTF(E_LOG, L_LAUDIO, "Pulseaudio context failed with error: %s\n", pa_strerror(errno));
}
else
DPRINTF(E_LOG, L_LAUDIO, "Pulseaudio context invalid state\n");
return -1;
}
return 0;
}
static int
stream_open(struct pulse_session *ps, pa_stream_notify_cb_t cb)
{
pa_stream_flags_t flags;
pa_sample_spec ss;
int offset;
int ret;
DPRINTF(E_DBG, L_LAUDIO, "Opening Pulseaudio stream to '%s'\n", ps->devname);
@ -551,6 +570,13 @@ stream_open(struct pulse_session *ps, pa_stream_notify_cb_t cb)
ss.channels = 2;
ss.rate = 44100;
offset = cfg_getint(cfg_getsec(cfg, "audio"), "offset");
if (abs(offset) > 44100)
{
DPRINTF(E_LOG, L_LAUDIO, "The audio offset (%d) set in the configuration is out of bounds\n", offset);
offset = 44100 * (offset/abs(offset));
}
pa_threaded_mainloop_lock(pulse.mainloop);
if (!(ps->stream = pa_stream_new(pulse.context, "forked-daapd audio", &ss, NULL)))
@ -558,11 +584,10 @@ stream_open(struct pulse_session *ps, pa_stream_notify_cb_t cb)
pa_stream_set_state_callback(ps->stream, cb, ps);
// TODO should we use PA_STREAM_ADJUST_LATENCY?
flags = PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_ADJUST_LATENCY | PA_STREAM_AUTO_TIMING_UPDATE;
ps->attr.maxlength = (uint32_t)-1;
ps->attr.tlength = STOB(2 * ss.rate); // 2 seconds latency
ps->attr.tlength = STOB(2 * ss.rate - offset); // 2 second latency
ps->attr.maxlength = 2 * ps->attr.tlength;
ps->attr.prebuf = (uint32_t)-1;
ps->attr.minreq = (uint32_t)-1;
ps->attr.fragsize = (uint32_t)-1;
@ -734,6 +759,10 @@ pulse_write(uint8_t *buf, uint64_t rtptime)
{
ret = pa_context_errno(pulse.context);
DPRINTF(E_LOG, L_LAUDIO, "Error writing Pulseaudio stream data to '%s': %s\n", ps->devname, pa_strerror(ret));
ps->state = PA_STREAM_FAILED;
pulse_session_shutdown(ps);
continue;
}
}
@ -741,6 +770,58 @@ pulse_write(uint8_t *buf, uint64_t rtptime)
pa_threaded_mainloop_unlock(pulse.mainloop);
}
static void
pulse_playback_start(uint64_t next_pkt, struct timespec *ts)
{
struct pulse_session *ps;
pa_operation* o;
pa_threaded_mainloop_lock(pulse.mainloop);
for (ps = sessions; ps; ps = ps->next)
{
o = pa_stream_cork(ps->stream, 0, NULL, NULL);
if (!o)
{
DPRINTF(E_LOG, L_LAUDIO, "Pulseaudio could not resume '%s': %s\n", ps->devname, pa_strerror(pa_context_errno(pulse.context)));
continue;
}
pa_operation_unref(o);
}
pa_threaded_mainloop_unlock(pulse.mainloop);
}
static void
pulse_playback_stop(void)
{
struct pulse_session *ps;
pa_operation* o;
pa_threaded_mainloop_lock(pulse.mainloop);
for (ps = sessions; ps; ps = ps->next)
{
o = pa_stream_cork(ps->stream, 1, NULL, NULL);
if (!o)
{
DPRINTF(E_LOG, L_LAUDIO, "Pulseaudio could not pause '%s': %s\n", ps->devname, pa_strerror(pa_context_errno(pulse.context)));
continue;
}
pa_operation_unref(o);
o = pa_stream_flush(ps->stream, NULL, NULL);
if (!o)
{
DPRINTF(E_LOG, L_LAUDIO, "Pulseaudio could not flush '%s': %s\n", ps->devname, pa_strerror(pa_context_errno(pulse.context)));
continue;
}
pa_operation_unref(o);
}
pa_threaded_mainloop_unlock(pulse.mainloop);
}
static int
pulse_flush(output_status_cb cb, uint64_t rtptime)
{
@ -758,13 +839,21 @@ pulse_flush(output_status_cb cb, uint64_t rtptime)
i++;
ps->status_cb = cb;
o = pa_stream_cork(ps->stream, 1, NULL, NULL);
if (!o)
{
DPRINTF(E_LOG, L_LAUDIO, "Pulseaudio could not pause '%s': %s\n", ps->devname, pa_strerror(pa_context_errno(pulse.context)));
continue;
}
pa_operation_unref(o);
o = pa_stream_flush(ps->stream, flush_cb, ps);
if (!o)
{
DPRINTF(E_LOG, L_LAUDIO, "Pulseaudio could not flush '%s': %s\n", ps->devname, pa_strerror(pa_context_errno(pulse.context)));
continue;
}
pa_operation_unref(o);
}
@ -784,7 +873,6 @@ pulse_set_status_cb(struct output_session *session, output_status_cb cb)
static int
pulse_init(void)
{
struct pulse *p = &pulse;
char *type;
int state;
int ret;
@ -798,7 +886,7 @@ pulse_init(void)
if (!(pulse.mainloop = pa_threaded_mainloop_new()))
goto fail;
if (!(p->cmdbase = commands_base_new(evbase_player, NULL)))
if (!(pulse.cmdbase = commands_base_new(evbase_player, NULL)))
goto fail;
#ifdef HAVE_PULSE_MAINLOOP_SET_NAME
@ -808,7 +896,7 @@ pulse_init(void)
if (!(pulse.context = pa_context_new(pa_threaded_mainloop_get_api(pulse.mainloop), "forked-daapd")))
goto fail;
pa_context_set_state_callback(pulse.context, context_state_cb, p);
pa_context_set_state_callback(pulse.context, context_state_cb, NULL);
if (pa_context_connect(pulse.context, NULL, 0, NULL) < 0)
{
@ -849,14 +937,16 @@ pulse_init(void)
if (ret)
DPRINTF(E_LOG, L_LAUDIO, "Error initializing Pulseaudio: %s\n", pa_strerror(ret));
pulse_free(p);
pulse_free();
return -1;
}
static void
pulse_deinit(void)
{
pulse_free(&pulse);
pulse_session_shutdown_all(PA_STREAM_UNCONNECTED); // TODO Required?
pulse_free();
}
struct output_definition output_pulse =
@ -872,6 +962,8 @@ struct output_definition output_pulse =
.device_probe = pulse_device_probe,
.device_free_extra = pulse_device_free_extra,
.device_volume_set = pulse_device_volume_set,
.playback_start = pulse_playback_start,
.playback_stop = pulse_playback_stop,
.write = pulse_write,
.flush = pulse_flush,
.status_cb = pulse_set_status_cb,